Different types of plastic have different melting points, and the specific melting point can vary depending on the type and composition of the plastic material. Some plastics have low melting points, such as polyethylene (PE), which typically melts around 105°C to 135°C (221°F to 275°F), while others have higher melting points, like polycarbonate (PC), which typically melts around 220°C to 250°C (428°F to 482°F) . The melting point of plastic is extremely important due to its influence on various aspects of plastic materials in manufacturing and processing. Understanding the melting temperature is relevant in determining suitable methods for shaping and molding plastic, such as injection molding, extrusion, and blow molding. It is also crucial in preventing degradation, deformation, and undesirable changes in the plastics properties that can occur when the melting temperature is exceeded. Below are some examples of the melting points of different types of plastic:

• LDPE: begins melting at 105°C
• HDPE: begins melting at 125°C
• Polypropylene (PP): melting temperature of 160°C, starts to melt around 130°C
• PVC: melting point of around 210°C
• PET: melting point of 255°C
• Polystyrene: melting point range of 100 to 120°C
• ABS: melting temperature range of 190-270°C

Its important to note that the melting point of plastic can also depend on factors such as molecular weight, crystallinity, and additives present in the plastic.